Thank you for asking a question on www.thisisyourbible.com
There are no real "predictions" around the year 2012. 2012 is the year when the 4th cycle of the Mayan calendar comes to an end. What happens after that? The fifth cycle begins!
Christians should not pay attention to sensationalized claims about prophecies from ancient paganism. By definition, these predictions are not from God and are therefore false.
Here are links to solid Biblically sound information about the "end of the world" and the return of Christ:
I hope you have found this helpful.
May God bless you,